\section{Using Ydiff to check results}
\label{sec:ydiff_check_results}
+\index{Ydiff}
Delivered with Infinity \CGG{} and in the \CGG{} path, there is a file \texttt{ydiff.C} This program compares the output from 2 files to see the differences . Do: \texttt{cd cin\_path} and key in \texttt{make ydiff}.
\section{Image Sequence Creation}
\label{sec:image_sequence_creation}
+\index{image sequence}
Example script to create a jpeglist sequence file is next:
\begin{lstlisting}[numbers=none]
#!/bin/bash
out="$1"
-dir=`dirname "$out"`
+dir=$(dirname "$out")
shift
-geom=`jpegtopnm "$1" | head -2 | tail -1`
-w=`(set - $geom; echo $1)`
-h=`(set - $geom; echo $2)`
+geom=$(jpegtopnm "$1" | head -2 | tail -1)
+w="$(echo $geom | cut -d " " -f1)"
+h="$(echo $geom | cut -d " " -f2)"
exec > $out
echo "JPEGLIST"
echo "# First line is always JPEGLIST"
echo "$h"
echo "# List of image files follows"
while [ $# -gt 0 ]; do
- if [ x`dirname "$1"` = x"$dir" ]; then
+ if [ x$(dirname "$1") = x"$dir" ]; then
f=./`basename "$1"`;
else
f="$1";
shift
done
\end{lstlisting}
+To use this script, you will have to install the package on your operating system that
+includes \textit{jpegtopnm} which is ususally \textit{netpbm}.
Example usage of this script follows:
\qquad \texttt{jpeglist.sh outfile infiles*.jpg}
-\section{Webm\,/\,Vp9 Usage and Example File}
-\label{sec:webm/vp9_usage_example}
-% FIXME No footnotes with expressions of thanks in the title.
-% \protect\footnote{credit Frederic Roenitz}}
-
-\textsc{VP9} is a video codec licensed under the BSD license and is
-considered open source,
-% Sisvel Announces AV1 Patent Pool, March 10, 2020
-% https://www.streamingmedia.com/Articles/ReadArticle.aspx?ArticleID=139636
-% Webm / VP9 is a media file format which is free to use under the
-% BSD license and is open-source; thus there are no licensing
-% issues to be concerned about.
-the \textsc{Webm} container is based on \textsc{Matroska} for video
-and \textsc{Opus} for audio. There are some common \textsc{VP9} rendering
-options files that support creation of video for YouTube,
-Dailymotion, and other online video services.
-
-YouTube easy startup steps are documented in the Appendix (\ref{sec:youtube_with_cinelerra}). These same steps have been verified to work for creating Dailymotion videos -- however, the created files must be renamed before uploading to change the youtube extension to webm instead for Dailymotion.
-
-Below is one of the \textsc{VP9} rendering options file with documentation for specifics:
-
-\textbf{webm libvpx-vp9}
-
-(20171114-2203)
-
-from {\small \url{https://developers.google.com/media/vp9/settings/vod/}}
-
-1280x720 (24, 25 or 30 frames per second)
-
-Bitrate (bit rate)
-
-\textsc{VP9} supports several different bitrate modes:
-
-\textit{mode:}
-
-\begin{tabular}{p{6cm} p{10cm}}
- Constant Quantizer (Q) & Allows you to specify a fixed quantizer value; bitrate will vary \\
- Constrained Quality (CQ) & Allows you to set a maximum quality level. Quality may vary within bitrate parameters\\
- Variable Bitrate (VBR) & Balances quality and bitrate over time within constraints on bitrate\\
- Constant Bitrate (CBR) & Attempts to keep the bitrate fairly constant while quality varies\\
-\end{tabular}
-
-CQ mode is recommended for file-based video (as opposed to streaming). The following FFMpeg command-line parameters are used for CQ mode:
-
-\textit{FFMpeg}:
-
-\begin{center}
- \begin{tabular}{{p{4cm} p{10cm}}}
- -b:v <arg> & Sets target bitrate (e.g. 500k)\\
- -minrate <arg> & Sets minimum bitrate.\\
- -maxrate <arg> & Sets maximum bitrate.\\
- -crf <arg> & sets maximum quality level. Valid values are 0-63, lower numbers are higher quality.\\
-\end{tabular}
-\end{center}
-
-\textit{Note 1}: Bitrate is specified in kbps, or kilobits per second. In video compression a kilobit is generally assumed to be 1000 bits (not 1024).
-
-\textit{Note 2:} Other codecs in FFMpeg accept the \textit{-crf} parameter but may interpret the value differently. If you are using \textit{-crf} with other codecs you will likely use different values for VP9.
-
-\texttt{bitrate=1024k}\\
-\texttt{minrate=512k}\\
-\texttt{maxrate=1485k}\\
-\texttt{crf=32}
-
-\textit{Tiling} splits the video into rectangular regions, which allows multi-threading for encoding and decoding. The number of tiles is always a power of two. 0=1 tile; 1=2; 2=4; 3=8; 4=16; 5=32\\
-\texttt{tile-columns=2}
-
-(modified from {\small \url{https://trac.ffmpeg.org/wiki/EncodingForStreamingSites}})
-
-To use a 2 second \textit{GOP} (Group of Pictures), simply multiply your output frame rate $\times$ 2. For example, if your input is \textit{-framerate 30}, then use \textit{-g 60}.\\
-\texttt{g=240}
-
-number of \textit{threads} to use during encoding\\
-\texttt{threads=8}
-
-\textit{Quality} may be set to good, best, or realtime\\
-\texttt{quality=good}
-
-\textit{Speed}: this parameter has different meanings depending upon whether quality is set to good or realtime. Speed settings 0-4 apply for VoD in good and best, with 0 being the highest quality and 4 being the lowest. Realtime valid values are 5-8; lower numbers mean higher quality\\
-\texttt{speed=4}
-
\section{Details about .bcast5 Files}
\label{sec:details_.bcast5_files}
+\index{.bcast5}
The following extensions of files in \CGG{}'s \texttt{.bcast5} directory are explained below.
\item [.png] thumbnails of files in Resources so they do not have to be created over and over
\end{labeling}
-
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